New IBM chip could serve a PowerBook G5, but is it too little too late?

IBM’s announcement of a low-power 970FX PowerPC G5 processor yesterday came as a bit of a surprise to some analysts and industry insiders who believe the chip could be the first worthy contender to power a G5-based laptop from Apple, but question if Mac maker will choose to use it. Two variants of the chip — a 1.2 ghz version…